/Engine/Plugins/Experimental/NNE/Source/NNE/Public/NNETypes.h
The enum lists all tensor data types used in NNE
enum ENNETensorDataType { None, Char, Boolean, Half, Float, Double, Int8, Int16, Int32, Int64, UInt8, UInt16, UInt32, UInt64, Complex64, Complex128, BFloat16, }